Seabury Mastick Papers

Seabury Cone Mastick was a legislator and banker in New York state who later married artist Kathrin Cawein. He was born in San Francisco, California on August 19, 1871 to William Henry Cone and Laura Jeanette Mastick. Left an orphan early in life, he was adopted by his mother’s brother and his wife, Seabury L. Mastick and Mary Wood Mastick. He attended Hopkins Academy in Oakland California before entering Oberlin College in 1887. While at Oberlin he met Agnes Eliza Warner, whom he married in 1896. After graduation he studied law at the University of California, Hastings School of Law receiving his Bachelor of Laws (LLB) in 1894. He also received a Masters Degree from Oberlin in 1894. He practiced law until 1917, specializing in patent litigation. In 1917 he became an officer in the United States Navy, rising to Lieutenant Commander before his retirement in 1920. He was awarded a silver star for inventing the high velocity star shell artillery ammunition. He later worked in chemical manufacturing after getting out of the navy. He had a career in politics from 1921 to 1935, serving on the New York State Assembly and as a New York Senator from 1923 to 1935. He worked in the banking industry from 1936 to 1958. Mr. and Mrs. Mastick had no children. Agnes Mastick died November 8th, 1963. The following year Seabury married artist Kathrin Cawein. Seabury died in Manchester, England on August 21, 1969.